Oxy-fuel gas tip and process of making



I Oct.- 25, 1927.

. 1,646,602 E. H. SMITH OXY-FUEL GAS TIP AND PROCESS MAKING Filed Fb. 4,1926 I V a 2 frzvn/of 54MB? /1. 544/771 V Patented Oct. 25, 1927.

-- rs aeoz ELMER H. SMITH, OF MINNEAPOLIS; MINNESOTA.

OXY-FUEL GAS TIP AND PROCESS OF MAKING.

Application filed February In the manufacture of tips for fuel gas,particularly those used for cutting and welding purposes, it has beencustomary to drill the tip from end to end to form the gas ductstherethrough.

pensive operation as the drills frequently break, sometimes when the tipis nearly completed, and it is necessary to do the work all over again.Manufacturers figure a certain in percentage of waste in the manufactureof tips in this way.

The object of my present invention is to provide a process of makinthese'tips which will eliminate entirely the drilling operation andenable a manufacturer to produce the article for a cost considerablybelow the usual manufacturing cost of a tip of this kind.

A further object is toprovide a'tip process that is a modification ofthe process shown and described in my pending application for LettersPatent of the United States,

. Serial Number 82,044, filed Jan. 18, 1926.

The invention consists generally in various constructions andcombinations all as hereinafter described and particularly pointed outin the claims.

'In the accompanying drawings forming part-of this. specification,

Figure-1 is a plan view partially in section of a core of metal fromwhich the fuel gas I tip is formed;

Figure 2 is a similar View illustrating the tip readyto be placed in anelectro-plating bath to form the jacket or shell. thereon;

Figure"3 is a sectional view 011 the line 3-3 of Figure 2;

Figure 4 is a detail view of one of the plates used at the end of thecore in the plating bath;

Figure 5 is-a modified form of. one of these plates;

Figure 6 is a longitudinalsectional view through a completed core afterthe shell or jacket has been formed thereon and the core has beenmachined and is ready for use;

Figure 7 is asectional viewon theline 7-7 of Figure 6;

Figure 8 is a sectional view showing the completed core with a centralbore to adap it for cutting purposes. a I I In the drawing, 2 representsthe core ofthe tip made preferably of a drawn block of copper having atapered end 3. This core usually is bored longitudinally with a small.drill for the purpose of making gas ducts This-has been a difliculteX-,

4, 1926. Serial No. 86,000.

therethrough and it is evident to anyone skilled in this work that adrilling operation of thls kind must. be tedious and expensive. The tipsare several inches long, necessarily so for the purpose of removing theflame as I against the squared ends of the coreQ- Then I pass wires 7 ofsuitable material that will fuse at a comparatively low temperaturethrough these holes and twist the ends together asindicated at 8 and 9,thereby drawmg the plates 4 and 5 firmly against the ends of the corewhile the wires 7 will extend along the peripheral surface of the corebearing thereon and be spaced apart aroundthe'surface of the corer-adistance corresponding to the distance between the holes in the plates 4and 5. When this has been gloue, I place the core in-"an' electro;plating bath and allow it to remainthere a suitable time. core over thewires forming longitudinal ribs on the peripheral surface of the coreand when these ribs have been formed of sufficient thickness I removethe plates and fuse the wires, thereby leaving a series of longitudinalducts 7 extending through the core from end to end through'whi'ch 'thefuel gas may flow to the end of the tip. The wires at the tapered end ofthe core following .the

that I utilize the electro-plating bath for accumulating or building upa body of metal 'over and around the surface of the core so that whenthe wires are removed a series of The metal will. collect on theconverging surface thereof will also con-- longitudinalgas conductingducts will be the head of the burner when the parts are assembled. vThis tip may be made of any suitable length or shape and while it isonly practicable to drill a tip of a certain length, there is no limitto the length of a tip that can be made in this way, or in themanufacture described in my application'previously referred to. Theducts need not be straight in a. tip of this kind and the shape ofthetip may be varied to adapt it for various purposes or for work wherean ordinary straight tip could not be conveniently used.

In most of the Views in this case I have omitted the central boreadapting the tip for welding purposes, but in Figure 8 I-show a centralbore 13 adapting the tip for cutting. The encircling ducts, in Figure 8are all formed in the same manner as described with reference to theprevious figures ofthis drawing.

I-claim as my invention:

1. A process of forming an oxy-fuel tip which consists in providing acore, mounting a series of wires on the periphery of said core in spacedrelation, immersing the core in an electro-plating bath until a shell orjacket of the desired thickness has been' formed o er the core and wiresand then removing the w1res. 2. A rocess of forming an oxy-fuel gas tipwhic consists in prov1ding acore, plac- .conducting ducts therethrough.

together to firmly. draw the guides against the core, immersing the corein an electroplating bath until a shell or jacket has been formed overthe core, and wires of sufficient thickness to completely cover thewires, then removing the guards and-wires.

8. A process of making tip which consists in providing a core having atapered end, mounting ribs longitudinally thereon in spaced relation,immersing the core in an electro-plating bath to form an encirclingshell or jacket over the ribs and core, then removing the ribs toprovide a series of longitudinal gas conducting ducts with their endsconverging at one end ofthe core. i 4. A process of making an oXy-fuelgas tip which consists in providing a core of metal having a. taperedend, placing disks against said ends, said disks provided with aperturesin their peripheral edges, engaging rib members with said apertures andseating said members on the peripheral sur-' face of the corein spacedrelation, securing the ends of the ribs to draw the disks firmly againstthe ends of the core, immersing the core in an electro-plating bathuntil a shell or jacket of the desired thickness has been formed aroundthe core, then removing the an oxy-fuel gas ribs to provide a series oflongitudinal. gas

In witness whereof, I have hereunto set my hand this 30th day ofJanuary, 1926. ELMER H. SMITH.

